When we look back at the Roman empire, we study military conquests, engineering feats, and significant advancements to European civilization as a whole. However, not all aspects of ancient Roman life were that monumental. When taking a break from pushing humanity forward, Romans of old used their time to play jokes on each other.
This fact tells of what must have been a particularly common prank in ancient Rome. The setup goes like this. Wait until your friend is asleep. Then, put sandals on their hand and tickle their face. If all goes to plan, your friend will have a rude awakening after slapping themselves in the face.